The 508-hp Volvo S60 Polestar Concept will be making its North American debut later this month at the 2012 LA Auto Show.

Powered by a turbocharged, inline-six cylinder engine, the S60 Polestar Concept packs a punch with 508 hp and 424 lb-ft of torque, a vast improvement over the factory S60 with 300 hp and 325 lb-ft of torque. Along with the flashy Rebel Blue paint job, the Swedish automaker and its tuning partner outfitted the S60 with Ohlins suspension to go along with its lowered, widened, and reinforced chassis.

Volvo’s performance partner since 1996, Polestar offers tuning technology and parts enhancement to various models from the Swedish automaker.

“This is Polestar’s interpretation of the Volvo S60,” says Christian Dahl, founder and CEO of Polestar. “It’s a car developed with our own preferences in mind — although we know they are also shared by active drivers.”

The Swedish automaker has finally revealed the specifications of its S60 Polestar Performance Concept, with the 3.0-liter, straight-six tuned to a whopping 508-hp and 424 lb-ft of torque. While the motor is still the production S60 engine, Polestar overhauled the entire longblock building it from bottom to top, as well as bolting on a more powerful Garrett turbocharger.

The stock transmission was then tossed out, replaced with a stronger six-speed manual while the Haldex all-wheel drive was fine tuned. To give the S60 a more aggressive look, the front end was widened a tad over 0.75-inch while the rear saw double that at nearly 1.5 inches wider. The car was then lowered almost 1.2 inches, while new sway bars make it a true handling machine.

Braking performance has been enhanced with Brembo brakes while 19-inch wheels complete the project. Polestar estimates that the S60 can hit 60-mph in just 3.9 seconds. With that sort of performance and such great looks coming from a Volvo model, call us impressed.